ANSI API RP 10B-5-2005 pdf free download – Petroleum and natural gas industries — Cements and materials for well cementing — Part 5: Determination of shrinkage and expansion of well cement formulations at atmospheric pressure.
This part of lS0 10426 provides the methods for the testing of well cement formulations to determine thedimension changes during the curing process (cement hydration) at atmospheric pressure only.This is a basedocument, because under real well cementing conditions shrinkage and expansion take place under pressureand different boundary conditions.
2Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences,only the edition cited applies.For undated references,the latest edition of the referenceddocument (including any amendments) applies.
ISO 10426-2:2003，Petroleum and natural gas industries — Cements and materials for well cementing 一Part 2: Testing of well cements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
bulk expansion
increase in the external volume or dimensions of a cement sample
3.2
bulk shrinkage
decrease in the external volume or dimensions of a cement sample
3.3
hydration shrinkage
difference in the volume between the hydration products and the volume of the dry cement,additives andwater
4Sampling4.1General
Samples of the neat cement or cement blend, solid and liquid additives, and mixing water are required to testa slurry according to this part of lSO 10426. Accordingly, the best available sampling technology should beemployed to ensure the laboratory test conditions and materials match as closely as possible those found atthe wellsite.Some commonly used sampling devices are shown in ISO 10426-2:2003, Figure 1.
4.2Method
Applicable sampling techniques for the fluids and materials used are specified in lSO 10426-2:2003, Clause 4.
5Determination of shrinkage or expansion under conditions of free access of waterat atmospheric pressure-Annular ring test
5.1General information
The annular expansion mould is a device suitable for measuring only the linear bulk shrinkage or expansionproperties of a cement formulation.The magnitude of expansion depends on the amount of expanding agent,cement powder,slurry design and curing condition(pressure, temperature, time, fluid access). t should benoted that expansion is strongly affected by boundary conditions. The chemical process of mineral growth isstrongly controlled by the state of stress and mineral growth will tend to occur where the stress value is thelowest, i.e. in pore space or empty spaces. Therefore, the degree of cement shrinkage and expansion isdependent on a number of conditions, not all of which can be uniquely defined.The test does not representfully the annulus of a well.
5.2Apparatus
5.2.1 Mould5.2.1.1 General
Use corrosion-resistant material (e.g. stainless steel). The outer diameter (OD) of the inner ring shall be50,8 mm (2 in) and the inner diameter (ID) of the outer expansion ring shall be 88,9 mm (3,5 in).See Figures 1,2 and 3.
5.2.1.2 Mould calibration
The resilience of the ring of the mould shall be calibrated annually. The resilience shall be such that the mass of 1 000 g ± 1 g (2,204 6 lb ± 0,002 lb) applied as shown in Figure 4 shall increase the distance between the two steel measurement balls (see Figure 9) by 2 mm ± 0,3 mm (0,078 7 in ± 0,011 8 in) without permanent deformation.
Attention must be paid to ensure that the load is applied perpendicular to the gap (90°) in order to avoid errors,which might be easily made. The readings shall be repeated at least three times to obtain an average value with a standard deviation of 0,05 mm (0,002 in).ANSI API RP 10B-5 pdf download.